What is a weldolet (Welding Outlet)?

Weldolet (Welding Outlet) is the most common of all branch connections, and is welded onto the outlet pipe. The ends are bevelled to facilitate this process, and therefore the weldolet is considered a butt-weld fitting. Weldolet (Welding Outlet) is designed to minimize stress concentrations and provide integral reinforcement. manufactured to meet your specific reinforcement requirements.

What is a weldolet (Welding Outlet)?

A Weldolet is commonly known on drawings as a WOL and makes a 90° branch connection. It comes in full size or reducing for a straight piece of pipe. A weldolet is designated by the run length by the branch length. For example a 6-inch weldolet on a 19-inch pipe would be a 19×6 Weldolet. 

Dimensions Weldolet Size on Size -STD- MSS SP97

DIMENSIONS NPS 1/2 TO 24

NPS	A	B	C	D
1/2	3/4 19.05	1.3/8 34.93	15/16 23.81	5/8 15.88
3/4	7/8 22.23	1.5/8 41.28	1.3/16 30.16	13/16 20.64
1	1.1/16 26.99	2 50.80	1.7/16 36.51	1.1/32 26.19
1¼	1¼ 31.75	2.3/8 60.3	1.3/4 44.45	1.3/8 34.93
1½	1.5/16 33.34	2.7/8 73	2 50.80	1.5/8 41.28
2	1½ 38.10	3½ 88.90	2.9/16 65.09	2.1/16 52.39
2½	1.5/8 41.28	4.1/16 103.19	3 76.20	2.7/16 61.91
3	1.3/4 44.45	4.13/16 122.24	3.11/16 93.66	3.1/16 77.79
3½	2 50.80	5.3/8 136.53	3.7/8 98.43	3.9/16 90.49
4	2 50.80	6 152.40	4.3/4 120.65	4 101.60
5	2¼ 57.15	7.1/8 180.98	5.9/16 141.29	5.1/16 128.59
6	2.3/8 60.3	8½ 215.90	6.11/16 169.86	6.1/16 153.99
8	2.3/4 69.85	10.3/8 263.53	8.11/16 220.66	7.15/16 201.61
10	3.1/16 77.79	12.9/16 319.09	10.13/16 274.64	10 254.00
12	3.3/8 85.73	14.7/8 377.83	12.13/16 325.44	12 304.80
14	3½ 88.90	16.1/8 409.58	14.1/16 357.19	13¼ 336.55
16	3.11/16 93.66	18¼ 463.55	16.1/16 407.99	15¼ 387.35
18	4.1/16 103.19	20.3/4 527.05	18.5/8 473.08	17¼ 438.15
20	4.5/8 117.48	23.1/16 585.79	20.1/16 509.59	19¼ 488.95
24	5.3/8 136.53	27.7/8 708.03	25.1/8 638.18	23¼ 590.55
NPS	A	B	C	D

General notes:

• Dimensions: Top Row in Inches / Bottom Row in millimeters.
• Root Gap – X – “Space” for welding the O’let is raised off the run pipe to establish proper
  
  weld gap by placing spacers, e.g. welding rods, under the fitting. This provides a uniform
  
  welding gap between the curvature of the run and base of fitting.
• L = Dimensions Center Line of Run Pipe + X (Root Gap) + A (height of Weldolet).
• Bevelled Ends ASME B16.9 and B16.25.
• Source comes from Bonney Forge (except the sizes in millimeters).
• Weldolet is a registered name. Another often used name is Welding Outlet.

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